Manual: gnudf

DF(1)							User Commands						       DF(1)

NAME
       df - report file system space usage

SYNOPSIS
       df [OPTION]... [FILE]...

DESCRIPTION
       This  manual page documents the GNU version of df.  df displays the amount of space available on the file system con‐
       taining each file name argument.	 If no file name is given, the space available on all currently mounted file systems
       is shown.  Space is shown in 1K blocks by default, unless the environment variable POSIXLY_CORRECT is set,  in  which
       case 512-byte blocks are used.

       If an argument is the absolute file name of a device node containing a mounted file system, df shows the space avail‐
       able  on	 that file system rather than on the file system containing the device node.  This version of df cannot show
       the space available on unmounted file systems, because on most kinds of systems doing so requires non-portable  inti‐
       mate knowledge of file system structures.

OPTIONS
       Show information about the file system on which each FILE resides, or all file systems by default.

       Mandatory arguments to long options are mandatory for short options too.

       -a, --all
	      include pseudo, duplicate, inaccessible file systems

       -B, --block-size=SIZE
	      scale  sizes by SIZE before printing them; e.g., '-BM' prints sizes in units of 1,048,576 bytes; see SIZE for‐
	      mat below

       -h, --human-readable
	      print sizes in powers of 1024 (e.g., 1023M)

       -H, --si
	      print sizes in powers of 1000 (e.g., 1.1G)

       -i, --inodes
	      list inode information instead of block usage

       -k     like --block-size=1K

       -l, --local
	      limit listing to local file systems

       --no-sync
	      do not invoke sync before getting usage info (default)

       --output[=FIELD_LIST]
	      use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted

       -P, --portability
	      use the POSIX output format

       --sync invoke sync before getting usage info

       --total
	      elide all entries insignificant to available space, and produce a grand total

       -t, --type=TYPE
	      limit listing to file systems of type TYPE

       -T, --print-type
	      print file system type

       -x, --exclude-type=TYPE
	      limit listing to file systems not of type TYPE

       -v     (ignored)

       --help display this help and exit

       --version
	      output version information and exit

       Display values are in units of the first available SIZE from --block-size,  and	the  DF_BLOCK_SIZE,  BLOCK_SIZE	 and
       BLOCKSIZE environment variables.	 Otherwise, units default to 1024 bytes (or 512 if POSIXLY_CORRECT is set).

       The  SIZE  argument is an integer and optional unit (example: 10K is 10*1024).  Units are K,M,G,T,P,E,Z,Y,R,Q (powers
       of 1024) or KB,MB,... (powers of 1000).	Binary prefixes can be used, too: KiB=K, MiB=M, and so on.

       FIELD_LIST is a comma-separated list of columns to be included.	Valid field names are: 'source', 'fstype', 'itotal',
       'iused', 'iavail', 'ipcent', 'size', 'used', 'avail', 'pcent', 'file' and 'target' (see info page).

AUTHOR
       Written by Torbjorn Granlund, David MacKenzie, and Paul Eggert.

REPORTING BUGS
       GNU coreutils online help: 
       Report any translation bugs to 

SEE ALSO
       Full documentation 
       or available locally via: info '(coreutils) df invocation'

       Packaged by Ubuntu (9.7-3ubuntu2)
       Copyright © 2025 Free Software Foundation, Inc.
       License GPLv3+: GNU GPL version 3 or later .
       This is free software: you are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

GNU coreutils 9.7					January 2026						       DF(1)